Presser-foot mechanism for sewing-machines.



P SIOSTROM. PRESSER 'FOOT MECHANISM FOR SEWING MACHINES.

APPLICATION man MAR. 21. I915.

1,190.199. Patented July 4,1916.

5 SHEETS-SHEET I H u 1 Tlibwsses: l'rwenlor: 0kg? W .Pelez; Q'fiaslrom,

um mums nzrzns m. Pnurou'mc. msmmmm. 114 a P. SJOSTROM. v PRESSER FOOTMECHANISM FOR SEWING MACHINES.

APPLICATION FILED MAR. 27. I915.

Patent ed July 4, I916.

lhpenlor: feter'josbmm, by l i Witnesses afl W 6 4 P. SJOSTROM.

PRESSER FOOT MECHANISM'FOR SEWING MACHINES.

APPLICATION FILED MAR. 27. 1915.

1 ,1 90, 1 99 Patented July 4, 1916.

5 SHEETS-SHEET 3.

Inventor: leler joslrom,

P. SJOSTROM. PRESSER FOOT MECHANISM FOR SEW ING MACHINES.

. APPLICATION FILED MAR-27, I915. 1,190,199.

Patented July 4, 1916. v

5 SHEETS-SHEET 4.

' Inventor:

- l'elcr josh'om,

by I

Pr SJOSTROM.

PRESSER FOOT MECHANISM FOR SEWING MACHINES.

APPLICATION HLED'MAR.27. 1915.

5 SHEETS-:SHEET 5.

. Inventor: l'ebcr yo-sham,

1n: nonms runs an. Puamrrua. wuumsmu. n. a

Patented July 4, 1916.

IETER SJ'OSTROM, 01?

MACHINERY COMPANY, MASSACHUSETTS.

MAPLEWOOD, MASS or BOSTON,

ACHUSETTS, ASSIGNOR TO VICTOR SHOE MASSACHUSETTS, CORPORATION OFPB'ESSER-FOOT MECHANISM FOR SEWING-MACHINES.

Specification of Letters Patent.

Original application filed February 17, 1915, Serial No. 9,465.

Divided and. this application filed March 27,

1915. Serial No. 17,943.

To all whom it may concern:

Be itknown that 1, PETER SJOSTROM, a subject of the King of Sweden, anda resident of Maplewood, in the county of Middlesex and State ofMassachusetts, have in vented certain new and useful Improvements inPresser-Foot Mechanisms for Sewing-Machines, of which the following is aspecification.

This invention relates to presser foot mechanisms for machines forsewing heavy material such as leather, and particularly to that class ofmachines known as welt sewing machines, and is a division of anapplication filed by me Feb. 17, 1915, and numbered 9,465.

The object of the present invention is "to provide a new and improvedpresser foot mechanism which will be automatically'operated toaccommodate the presser foot to various thicknesses of material whilethe presser foot is also adapted to be removed from the work whendesired without afiecting the automatic devices for actuating saidpresser foot. v 1

Another object of the invention is to profor automatically controllingthe amount of thread drawn from the source of supply whereby therequired amount of thread for various thicknesses assured.

The invention consists of certain novel features-of construction andarrangement of parts which will be fully understood by reference to thedescription of the drawings and to the claims hereinafter given.

Of the drawings: Figure 1 represents a side elevation of a machineembodying the principles of the present invention. Fig. 2 represents asectional detail showing the opposite side of the presser footmechanism. Fig. 3 represents a plan of the presser foot mechanism andthe thread regulating vices. Fig. 1 represents a front elevation of themachine. Fig. 5 elevation of the same, and Fig. 6 represents a verticalsection of the same. 1

Similar characters designate like parts throughout the figures of thedrawings.

In the drawings, 19 is a connector the lower end of which is connectedto any wellknown form of driving mechanism, while which bearings saidvide said presser foot mechanism with means of material is always theopposite end engage the awl carrier represents a left end upon a pinupon the needle carr1er45 the upper lever 20 loosely mounted upon a stud21 nonrevolubly mounted in a boss 22 formed upon 1 the frame 23,- thebase 2 1 of which is adapted to be secured to any well-known form ofsupport. The lever 20 is securedby means of the-bolt 26 to the gearsegment 27, the hub '28 of which is mounted upon the stud 21 about theaxis of which it is adapted to be oscillated.

By means of the connector 19, oscillatory movement may be'imparted tothe gear segment 27, the lever 20 moving through an arc the ends ofwhich are indicated by the dotted outlines a and b of the lever end. Theteeth of the gear segment 27 mesh with the teeth of the 'gear 29 securedto a shaft 30 mounted in bearingsvin the frame 23, in shaft is adaptedto be oscillated by means of the gear segment 2 The'shaft3O has a diskmember 31' having formed thereon radial shoulders 3233 which are adaptedto be engaged by a pin 34; extending laterally from the gear29. This pin34, during theoscillation of the gear 29, will impart movement to thedisk i with either of the shoulders ermitting said disk to remain at astandstill at the beginning of the movement of said pin 34 in eitherdirection, that is, while traveling from the shoulder 32 to the shoulder33 or vice versa. I

The disk 31 is provided with a cam projection 35 adapted to engage thetruck 36 on a lever 37 pivoted at 38 to the frame 22 of said lever 37being provided with a bearing member 39 adapted to when it is desired tofeed the work. The awl carrier 40 is provided with the usual curved awl11. The

truck 36 is retained normally in contact with the cam 35 by the spring37 X which forces the front end of the lever 37 upwardly, this outwardmovement being limited by the stop pin 38*.

The bearing member 39 consists of a screw threaded to the end of thelever 37 and held in adjusted position by means of the clamping nut 42.The awl carrier 40 is mounted 13 extending through ears formed said pinbeing the clamping prevented from rotating by end is pivotally connectedto a 31 when contactmg 3233, while Patented July 4., ram.

screw 46. The needle carrier 45 is provided with the usual curved barbedneedle 47 and oscillates about the stud 47 fixed in the frame 23. Theneedle carrier 45 is provided with a radial arm 45 to the end of whichis pivoted one end of a connector 106 the o posite end of which ispivoted at 105 to the disk 105 secured to and oscillating with thedriving shaft 30. It is obvious that the oscillatory movement of theshaft 30 will be imparted, through the connector 106*, to the needlecarrier 45 and in turn to the awl carrier 40. This awl carrier 40 isnormally separated from the needle carrier-45 by the spring 48 beingcompressed when by the movement of the lever 37 theawl carrier 40 ismoved toward the needle carrier 45 to feed the work.

For a detailed description of the work feeding mechanism reference maybe made to the application #9465 hereinbefore referred to. A stud 50 ismounted'in the frame 23 which serves as a pivot for the presser footcarrier 58 having secured thereto the presser foot 59. 7

he carrier 58 has an upward extension 60'formed thereon by which thepresser foot may be lifted from the work. The carrier 58 also has arearward extension 61 to which is secured a ratchet plate .62 having aplurality of ratchet'teeth 63 formed thereon in an arc of a circleconcentric with the pivot 64 of a pawl lever 65, the outer end of whichhas articulated thereto, at 66, a pawl 67 normally engaging the ratchetteeth 63. The pawl 67 is preferably secured by means of a pin 69 to alever 68, also pivoted at 66. The lever 68 has secured thereto one endof a spring 70, the opposite end of which is secured to a fixed pin 71,the tension of said spring normally retaining the pawl 67 in engagementwith the ratchet teeth 63. The forward end of the lever 68 is positionedwithin the forked end 72 of a hand lever 73 pivoted at 64 to said pivot64 consisting of a stud extending through the lever 73 and the presserfoot carrier 58 and being threaded to the lever all as shown in dottedlines in Fig. 3. The lever 68 is also provided on its under side with acam projection 74 adapted to be engaged at predetermined times by a camprojection 75, upon a cam disk 76 secured to the shaft 30, inorder todisengage the pawl 67 from the ratchet teeth 63. The lever 65 isprovided with a truck 77 adapted to be engaged by a cam 78 also mountedupon the shaft 30. The presser foot carrier 58 is also provided with alaterally extending arm 79 to which is secured one end of a spring 80the opposite end of which is secured to a member 81 pivoted at 82 to therear of the frame 23. The member 81 is also provided with a lateralcylindrical projection 83 extending over the lateral extension 79 whichthe presser foot carrier 58,

extension is provided with an upwardly extending flange 84 provided witha perforation through which the thread T passes from the source ofsupply between the projection 83 and the upper surface of the extension79, then downwardly through a hole 85 in said extension and upwardlythrough another hole 86 therein over said projection 88 and downwardlythrough the hole 87 in said extension along the under face of saidextension 79 to an eye 88 and then downwardly into the wax pot 89.

The thread T passes from the wax pot 89 to the work as fully describedin the appli cation hereinbefore mentioned, the slack in the threadbeing controlled by the take up lever 98 pivoted at 101 and moved aboutsaid pivot by the connector 103 pivoted at one end at 102 to said takeup while its opposite end. is pivotally connected at 104 to the disk105. The shaft 30 extends beyond the left end of the machine and hasadjustably secured thereto the arm 134 having a truck 135 at its outerend positioned in a cam groove 136 formed in a curved arm 137 of a lever138. This lever 138 is pivoted at 139 and is provided with an oppositelyex tending arm 140 having formed on its outer end a gear segment 141.The teeth of this gear segment 141 engage the teeth of the pinion 142secured to the shaft 143 formed upon the shuttle drive 144. The shuttle14.5 is mounted in a suitable fixed raceway 146 having pivoted thereto,at 147, a cap 148 which is adapted to be locked by a bolt 149.

The lever 81 is provided with a boss 151 to which is threaded anadjusting member 152, said member having threaded thereto a locknut 153and also having a string 154interposed between saidinut and boss andsurrounding the member 152. The nut 153 has a flat-sided contact withthe inner face of the lever 65 as indicated in Fig. 3 of the drawings.This member 152 is for the pur pose ofregulating the distance thelock ofthe stitch will be from the face of the work being operated upon, itbeing obvious that by adjusting the member 152 this lock may be locatedat any distance from the surface within reasonable limits. fact that allof the instrumentalities that assist in the formation ofthe stitch areopy means of the oscillating driving shaft 30 and if the time ofoperation of the thread measuring device is varied relatively to theoperations of the other instrumentalities the location of the lock ofthe stitch will also be varied, this location depending on the amount ofthread measured off. As the measurement of the thread is due to themovement of the lever 81 about its pivot and as this movement is causedby the engagement of the shoulder 162 with the end of the member 152 itisobvious that by varying the position of the engaging and of the memberThis is due to the I ping contact with the work.

152 the operation of the thread measuring device will be correspondinglyvaried and as a consequence the location of the lock of the stitch fromthe surface of the work will be similarly varied. WVhen the member 152has been adjusted for any particular work its position remains unchangedand at each os cillation of the cam shoulder 162 the same amount ofmovement will be imparted to the lever 81.

As the operation of the machine continues, when there is any variationin the thickness of the material, the measurement of the thread will beautomatically changed by the variation in the position of the presserfoot upon said material. This is due to the fact that the threadmeasurer 83 and the presser foot 59 are equidistant from the fulcrum 54so that when the presser foot is lifted a given distance to accommodatean increased thickness of material the lowering of the extension 79 willpull out more thread to accommodate this increased thickness ofmaterial. i/Vhen for any reason it is desired to pull out a quantity ofthread T from the source of supply the operator may accom-' plish thisby lifting the lever 81 and thereby drawing out the necessary length ofthread which may then be pulled through the work support 118. When thework is to be inserted, the operator seizes the handles 607 3 and otherreleases the pawl 67 from the teeth 63, thereby permitting the presserfoot 59 to be lifted. When the work has been positioned, the presserfoot 59 is moved into con tact with the work and the handles 60-73 arereleased, thus permitting the pawl 67 to return into engagement with theteeth 63.

During the operation of the machine, the parts 58-65 and 68 are normallylocked together, the cam 78 acting upon the roller 77 and retaining thepresser foot 59 in grip- WVhen the feeding operation is about to occur,the gripping pressure upon the work will be released by the roller 77entering the depression 160 in the cam 78 and the spring causing thepresser foot to be slightly lifted from the work. The continuedoscillation of the shaft 30 will cause the cam throw 161 to act upon thecam projection 74 and release the pawl 67 from the teeth 63 so that thepresser foot 59 at the completion of each feeding operation mayaccommodate itself to any variations in the thickness of the work whenreturning into contact therewith. At this time the projection 74 is incontact with the cam and acts as a fulcrum whereby the action of thespring 7 0 will pull down the rear end of the member 65 and lift thefront end thereof, thus causing the presser foot to be moved into lightcontact with the work after Which the cam throw 161 being removed fromconby pressing them toward each tact with the projection 7 1 the pawl 67will engage the teeth 63 and the continued reverse movement of the cam 78f willcause the presser foot togrip the work. It isobvious that thepresser foot 59 is first brought into light contact with the work andsubsequently the gripping pressure thereon is effected by the cam 78 andthat this gripping pressure is the same regardless of the thickness ofthe material.

The spring 70 is of considerable importance in the operation of themachine. Under normal conditions it retains the pawl 67 in engagementwith the ratchet teeth 63 in whatever position the presser foot 59 maybe. WVhen new work is to be inserted it is desirable that thepresserfoot 59 should be raised sufficiently to facilitate thepositioning of the work upon the work support 118. To permit the liftingof the presser foot the pawl 67 is disengaged from the teeth 63 by themovement of the lever 68 about its pivot 66 against the tension of saidspring 70; This movement of the lever 68 is accomplished by the movementof the lever 73 about its pivot 64, the operator gripping the handles60-73, and pressing them toward each other. As soon as the pawl 67 hasbeen disengaged from the teeth 63 the presser foot carrier 58 may befreely moved about its pivot 54 to lift the presser foot 59 while thework is being inserted, after which the operator releases the handles60-73 and the spring 70 moves the presser foot 59 into light contactwith the work after which the spring 70 will immediately act to move thepawl 67 into engagement with the teeth 63 and prevent any accidentallifting of the presser foot. At this time the presser foot is only inlight contact with the work but when the cam 7 8 acts upon the roller 77the carrier 58 is moved about its pivot 5i and the presser foot 59 isbrought into gripping contact with the work. During this move' ment ofthe carrier 58 the pawl 67 is retained in contact with the teeth 63 bythe spring 70 and if the ratchet plate 62 is moved the full length of atooth 63 the spring 7 0 will cause the pawl 67 to be moved intoengagement with the next tooth.

When the feeding operation is about to occur the roller 77 will enterthe depression 160 in the cam 78 and permit the spring 70 to pull downthe rear arm of the carrier 58 and slightly lift the presser foot 59from the work. During this pulling down movement the pawl 67 will beheld tightly enough against the teeth 63 by the spring 70 so that thecarrier 58, lever 65,pawl 67, and lever 68 will act as if formedintegral. At the completion of the work feeding operation, the pawl 67will be disengaged from the teeth 63 by the cam throw 161acting upon theprojection 74 of the lever 68 and mov- 'ing it about its pivot 66against the tension of the spring 70. While the pawl 67 is disengagedfrom the teeth 63 and the projection 74 is on the highest part of theperiphery of the cam 75 the spring 70 will pull down on the rear end ofthe lever 68, and as this is pivoted at 66 t0 the lever 65 it followsthat the rear end of this lever 65 will also be moved downwardly andwith the projection 74 as a fulcrum the front end will be movedupwardly, causing the carrier 58 to be moved about its fulcrum 54 andthe presser foot 59 brought into light contact with the work. The sameaction occurs when the operator releases the handles 6073 afterinserting new work. Subsequently in the reverse movement of the cam 75the throw 161 on the work is always will pass beneath the projection 7 1and the lever 68 will then be moved about its pivot 66 and the pawl 67will become engaged with the teeth 63. After the pawl has become engagedwith the ratchet teeth continued reverse movement of the shaft willcause the cam 78 to lift the roller 77 and move the carrier 58 about itsfulcrum 54 with the presser foot 59 in gripping pressure with the work.The gripping pressure the same and is not applied until after thepresser foot 59 has been brought into light contact with the work bymeans of the spring 7 0.

At every oscillation of the cam the end 162 thereof will act upon themember 152 to move the lever 81 about the pivot 82, thereby moving thelateral projection 83 away from the extension 79 and measuring off therequired amount of thread to form the stitch. This projection 83 isnormally retained in contact with the upper face of the extension 79 andbinds on the thread T,

passing through the flange 81 to the open- '1ng'85. It is obvious thatwhen this extension assumes a lower position, due to the increasedthickness of the work, a greater 7 amount of thread will be deliveredinasmuch as the-limit of the upward movement of the lever 81- is alwaysthe same.

In the operation of the machine, the operator grasps the handles 60 and73, moving them toward each other, thereby disengaging the pawl (37 fromthe teeth 63, thus permitting the presser foot 59 to be moved upwardlyabout the fulcrum 5 1 of the presser foot carrier. The work is thenplaced upon the work support 118 and the operator then releases thehandles 60 and 73, permitting the spring 70 to move the presser foot 59into contact with the upper face of the work, time being moved intoengagement with the teeth 63, and locking the various members together.The distance of the lock of the stitch from the surface of the work maybe determined accurately by the adjustment of the member 152. The gearsegment 27 is then oscillated in any wellknown manner.

the pawl 67 at the same This oscillation of the segment 27 will impartoscillatory movement to the gear and through this gear 29 to the maindriving shaft 30. The pin 3 1 on the gear 29 will coact with theshoulders 32 and 33 of the cam member 35 and move this cam mem ber 35 atthe end of the movement of the pin 34 in either direction. The movementof the cam 35 will operate the lever 37 moving it about its pivot 38 andcause the bearing member 39 to force the awl carrier 10 toward theneedle carrier 15, the awl 1-1 at this time being in the work andcausing the work to be fed so that the puncture therein caused by theawl will be brought into the plane of the needle 47, the awl 11 oncompleting its reverse movement being returned to its normal position bymeans of the spring 48. This reverse movement of the awl carrier doesnot occur until the point of the awl is entirely free from the underface of the work. During every oscillation of the cam 35 the heelportion 162 thereof coacts with the adjustable member 152 and raises thelever 81 about its pivot 82 against the tension of the spring 80. Thislifting of the lever 81 will cause the lateral projection 83 thereon tobe moved upwardly away from the extension 79 on the presser foot carrier58, thus drawing from the source of supply the necessary length ofthread T for the formation of the next stitch. Nermally the presser foot59 is retained in gripping contact with the Work by means of the cam 78acting upon the roll 77 mounted upon the lever pivoted at one end to thepresser foot carrier 58 and at the other to the pawl lever 68. When thefeeding operation is about to take place the depression 169 in the cam78 permits the roll 77 to be lowered and the presser foot 59 to beraised by means of the spring 70. The cam throw 151 immediately actsupon the pawl lever (38 to disengage it from the teeth 63 and the springthen acts upon the lever 65 with the roll 77 as a fulcrum and causes thepresser foot to be brought into light contact with the upper surface ofthe work in its fed positi on. The return movement of the cams and 78will cause the pawl (37 to first .J

engage with the teeth 63 and then as the roll 77 moves from thedepression onto the higher portion of the cam 78 the presser foot 59will be forced into gripping contact with the work.

It is obvious that by this construction means is provided whereby atevery movement of the work the presser foot may adjust itself forvariations in thickness of the material. It is obvious also that by thepresser foot 59 changing'its position for varying thicknesses ofmaterial, the lateral extension 79 on the carrier 58 will be raised orlowered and consequently a lesser or greater amount of thread T will bedrawn from the source of supply, and to take care of these variations inthe thickness of the material being acted upon.

It is believed that the operation and many advantages of this machinewill be fully understood from the foregoing description.

Having thus described my invention, I claim:

1. In a machine of the class described, the combination of a stitchforming mechanism; a member for actuating said mechanism adapted to beoscillated during the formation of each stitch; means for oscillatingsaid member; a work support; a presser foot mechanism; and a cam on saidoscillating member for actuating said presser foot mechanism.

2. In a machine of the class described, the combination of anoscillating member; means for oscillating said member; a cam on saidmember; a work support; a presser foot provided with a rearwardextension having ratchet teeth; a pivoted pawl engaging said teeth andcontrolled by said cam; and means pivoted to said presser foot extensionfor moving said pawl about its pivot.

3. In a machine of the class described, the combination of anoscillating member; means for oscillating said member; a cam on saidmember; a work support; a presser foot provided with a rearwardextension having ratchet teeth; a lever pivoted thereto and controlledby said cam; a pawl pivoted to the free end thereof; resilient means forretaining said pawl in engagement with said teeth; and means fordisengaging said awl.

p 4. In a machine of the class described, the combination of anoscillating member; means for oscillating said member; a cam on saidmember; a work support; a presser foot provided with a rearwardextension having ratchet teeth; a lever pivoted thereto and controlledby said cam; a pawl pivoted to the free end of said lever; resilientmeans for retaining said pawl in engagement with said teeth; andautomatic means for disengaging said pawl at a predetermined time.

5. In a machine of the class described, the combination of a worksupport; a presser foot provided with a rearward extension havingratchet teeth; a cam controlled lever pivoted thereto; a pawl pivoted tothe free end of sald lever and having an arm provided with a camengaging projection; resilient means for retaining said pawl inengagement with said teeth; and means for disengaging said pawl.

6. In a machine of the class described, the combination of a worksupport; a presser foot provided with a rearward extension havingratchet teeth; a cam controlled lever pivoted thereto; a pawl pivoted tothe free end of said lever and having an arm provided with a camengaging projection; re-

silient means for retaining said pawl in engagement with said teeth; anda cam adapted to engage said projection and disengage said pawl.

7 In a machine of the class described, the combination of a worksupport; a presser foot provided with a rearward extension havingratchet teeth; a cam controlled lever pivoted thereto; a pawl pivoted tothe free end of said lever and having an arm provided With a camengaging projection; resilient means for retaining said pawl inengagement with said teeth; a cam adapted to engage said projection anddisengage said pawl; and a forked lever pivoted to said extension andadapted in its movement about said pivot to disengage said pawl.

8.. In a machine of the class described, the combination of a worksupport; a pivoted presser foot having a rearward extension providedwith a lateral arm with a pluralityof thread holes therein; a coactingpivoted lever having a rounded projection; a spring interposed betweensaid arm and lever to retain said projection in contact with the upperface of said arm; an oscillating member; and means on said'oscillatingmember for moving said lever about its pivot to measure the threadpassing around said lever projection and through the thread holes insaid arm.

9. In a machine of the class described, the combination of aworksupport; a pivoted presser foot having a rearward extensionprovided'with a lateral arm with a plurality of thread holes therein; acoacting pivoted lever having a rounded projection; an adjustable memberon said lever; a spring interposed between said arm and lever to retainsaid projection in contact with the upper face of said arm; anoscillating member; and means on said oscillating member coacting withsaid adjustable member for moving said lever about its pivot to measurethe thread passing around said lever projection and through the threadholes in said arm.

10. In a machine of the class described, the combination of a pivotedpresser foot; a thread measuring device controlled thereby; and a singleoscillating member for ac tuating both-said presser foot and measuringdevice.

11. In a machine of the class described, the combination of a pivotedpresser foot having a rearwardly extending arm with a plurality ofthread holes therein; a pivoted lever having a lateral projectioncoacting with said arm over which the thread passes between two of saidthread holes; and means for moving said lever relatively to said arm tomeasure the thread. 1

12. In a machine of the class described, the combination of a pivotedpresser foot having a rearwardly extending arm with a plurality ofthread holes therein; a pivoted lever having a lateral projectioncoacting with said arm over which the thread passes between two of saidthread-holes; and oscillating means for moving said lever relatively tosaid arm to measure the thread.

13. In a machine of the class described, the combination of a pivotedpresser foot having a rearward extension and a lateral arm with aplurality of thread holes; a pivoted lever having a lateral projectioncoacting with said arm over which the thread passes between two of saidthread holes; means for moving said lever relatively to said arm tomeasure the thread; a plurality of ratchet teeth on the free end of saidextension; a pawl engaging therewith; and cam mechanism for controllingthe engagement of said pawl.

14. In a machine of the class described,

the combination of a pivoted presser foot having a rearward extensionand a lateral arm with a plurality of thread holes; a pivoted leverhaving a lateral projection coacting with said arm over which the threadpasses between two of said thread holes; means for moving said leverrelatively to said arm to measure the thread; a plurality of ratchetteeth on the free end of said extension; a pawl engaging therewith; cammechanism for controlling the engagement of said pawl; and manuallyoperated means for disengaging said pawl. 15. In a machine of the classdescribed, the combination of an oscillating shaft; a gear secured tosaid shaft having a lateral projection; a member loosely mounted on saidshaft adapted to be intermittently engaged by said projection; and athread measuring device operable by said loosely mounted member.

16. In a machine of the class described, the combination of anoscillating shaft; a gear secured to said shaft having a lateralprojection; a member loosely mounted on said shaft adapted to beintermittently engaged by said projection; a thread measuring device;and an adjustable member thereon adapted to be engaged by said looselymounted member to operate said thread measuring device.

17. In a machine of the class described, the combination of a stitchforming mechanism; a driving shaft for actuating said mechanism adaptedto be oscillated during the formation of each stitch; a work support; apresser foot; and means controlled by said Copies of this patent may beobtained for five cents each, by addresalng'the position of the stitchin the oscillating driving shaft for actuating said presser foot.

18. In a machine of the class described, the combination of a stitchforming mechanism; an oscillating driving shaft for actuating saidmechanism adapted to be oscillated during the formation of each stitch;a work support; a presser foot; and cam members on said oscillatingdriving shaft for actuating said presser foot.

19. In a machine of the class described, the combination of anoscillating driving shaft; a work support; a pivoted presser foot havinga rearward extension provided with a lateral arm with aplurality ofthread holes therein; a coacting pivoted lever having a roundedprojection; an adjustable member on said lever; a spring interposedbetween said arm and lever to retain said projection in contact with theupper face of said arm; and, means on said oscillating driving shaftcoacting with said adjustable member for moving said lever about itspivot to measure the thread passing around said lever projection andthrough the thread holes in. said arm to determine the locking work.

20. In a machine of the class described, the combination of anoscillating driving shaft; a work support; a pivoted presser foot havinga rearward extension provided with a lateral arm with a plurality ofthread holes therein; a coacting pivoted lever having a roundedprojection; an adjustable member on said lever; a spring interposedbetween said arm and lever to retain said projection in contact with theupper face of said arm; and means on said oscillating driving shaftcoacting with said adjustable member for moving said lever about itspivot to measure the thread passing around said lever projection andthrough the thread holes in said arm to determine the locking positionof the stitch in the Work.

21. In a machine of the class described, the combination of anoscillating member; a thread 'measuring device having a lateral lugthereon; a member threaded to said lug and adapted to be engaged by saidoscillating member; a nonrevoluble nut on said threaded member; and aspring surrounding said member between said nut and lug.

Signed by me at Boston, Mass, this 17th day of March, 1915.

7 PETER SJOSTROM. fitnesses lVAL'rnR E. LOMBARD; NATHAN C. LOMBARD.

Commissioner 61? Eatents,

Washington, D. C.

